thanks for the response Suraj! yes i checked the value being set and i removed all wild cards /usr/lib/hbase/conf:/usr/java/default/lib/tools.jar:/usr/lib/hbase:/usr/lib/hbase/hbase-0.90.1-cdh3u0.jar:/usr/lib/hbase/hbase-0.90.1-cdh3u0-tests.jar:/usr/lib/hbase/lib/activation-1.1.jar:/usr/lib/hbase/lib/asm-3.1.jar:/usr/lib/hbase/lib/avro-1.3.3.jar:/usr/lib/hbase/lib/commons-cli-1.2.jar:/usr/lib/hbase/lib/commons-codec-1.4.jar:/usr/lib/hbase/lib/commons-el-1.0.jar:/usr/lib/hbase/lib/commons-httpclient-3.1.jar:/usr/lib/hbase/lib/commons-lang-2.5.jar:/usr/lib/hbase/lib/commons-logging-1.1.1.jar:/usr/lib/hbase/lib/commons-net-1.4.1.jar:/usr/lib/hbase/lib/core-3.1.1.jar:/usr/lib/hbase/lib/guava-r06.jar:/usr/lib/hbase/lib/hadoop-core.jar:/usr/lib/hbase/lib/hbase-0.90.1-cdh3u0.jar:/usr/lib/hbase/lib/jackson-core-asl-1.5.2.jar:/usr/lib/hbase/lib/jackson-jaxrs-1.5.5.jar:/usr/lib/hbase/lib/jackson-mapper-asl-1.5.2.jar:/usr/lib/hbase/lib/jackson-xc-1.5.5.jar:/usr/lib/hbase/lib/jasper-compiler-5.5.23.jar:/usr/lib/hbase/lib/jasper-runtime-5.5.23.jar:/usr/lib/h base/lib/jaxb-api-2.1.jar:/usr/lib/hbase/lib/jaxb-impl-2.1.12.jar:/usr/lib/hbase/lib/jersey-core-1.4.jar:/usr/lib/hbase/lib/jersey-json-1.4.jar:/usr/lib/hbase/lib/jersey-server-1.4.jar:/usr/lib/hbase/lib/jettison-1.1.jar:/usr/lib/hbase/lib/jetty-6.1.26.jar:/usr/lib/hbase/lib/jetty-util-6.1.26.jar:/usr/lib/hbase/lib/jruby-complete-1.0.3.jar:/usr/lib/hbase/lib/jsp-2.1-6.1.14.jar:/usr/lib/hbase/lib/jsp-api-2.1-6.1.14.jar:/usr/lib/hbase/lib/jsp-api-2.1.jar:/usr/lib/hbase/lib/jsr311-api-1.1.1.jar:/usr/lib/hbase/lib/log4j-1.2.16.jar:/usr/lib/hbase/lib/protobuf-java-2.3.0.jar:/usr/lib/hbase/lib/servlet-api-2.5-6.1.14.jar:/usr/lib/hbase/lib/servlet-api-2.5.jar:/usr/lib/hbase/lib/slf4j-api-1.5.8.jar:/usr/lib/hbase/lib/slf4j-log4j12-1.5.8.jar:/usr/lib/hbase/lib/stax-api-1.0.1.jar:/usr/lib/hbase/lib/thrift-0.2.0.jar:/usr/lib/hbase/lib/xmlenc-0.52.jar:/usr/lib/hbase/lib/zookeeper.jar:/usr/lib/zookeeper/zookeeper-3.3.3-cdh3u0.jar:/usr/lib/hadoop/hadoop-0.20.2-cdh3u0 -core.jar
Also when the mapper runs it prints the environment as 12/02/08 12:31:09 INFO zookeeper.ZooKeeper: Client environment:java.class.path=/usr/lib/hadoop-0.20/conf:/usr/java/default/lib/tools.jar:/usr/lib/hadoop-0.20:/usr/lib/hadoop-0.20/hadoop-core-0.20.2-cdh3u0.jar:/usr/lib/hadoop-0.20/lib/aes.jar:/usr/lib/hadoop-0.20/lib/ant-contrib-1.0b3.jar:/usr/lib/hadoop-0.20/lib/aspectjrt-1.6.5.jar:/usr/lib/hadoop-0.20/lib/aspectjtools-1.6.5.jar:/usr/lib/hadoop-0.20/lib/commons-cli-1.2.jar:/usr/lib/hadoop-0.20/lib/commons-codec-1.4.jar:/usr/lib/hadoop-0.20/lib/commons-daemon-1.0.1.jar:/usr/lib/hadoop-0.20/lib/commons-el-1.0.jar:/usr/lib/hadoop-0.20/lib/commons-httpclient-3.0.1.jar:/usr/lib/hadoop-0.20/lib/commons-logging-1.0.4.jar:/usr/lib/hadoop-0.20/lib/commons-logging-api-1.0.4.jar:/usr/lib/hadoop-0.20/lib/commons-net-1.4.1.jar:/usr/lib/hadoop-0.20/lib/core-3.1.1.jar:/usr/lib/hadoop-0.20/lib/hadoop-capacity-scheduler-0.20.2-cdh3u0.jar:/usr/lib/hadoop-0.20/lib/hadoop-datajoin-0.20.2-cdh3u0.jar:/usr/lib/hadoop-0.20/lib/hadoop-failmon-0.20.2-cdh3u0.jar:/usr/lib/hadoop- 0.20/lib/hadoop-fairscheduler-0.20.2-cdh3u0.jar:/usr/lib/hadoop-0.20/lib/hadoop-gridmix-0.20.2-cdh3u0.jar:/usr/lib/hadoop-0.20/lib/hadoop-index-0.20.2-cdh3u0.jar:/usr/lib/hadoop-0.20/lib/hadoop-lzo-0.4.10.jar:/usr/lib/hadoop-0.20/lib/hadoop-mrunit-0.20.2-cdh3u0.jar:/usr/lib/hadoop-0.20/lib/hadoop-streaming-0.20.2-cdh3u0.jar:/usr/lib/hadoop-0.20/lib/hadoop-thriftfs-0.20.2-cdh3u0.jar:/usr/lib/hadoop-0.20/lib/hadoop-vaidya-0.20.2-cdh3u0.jar:/usr/lib/hadoop-0.20/lib/hdfsproxy-2.0.jar:/usr/lib/hadoop-0.20/lib/hsqldb-1.8.0.10.jar:/usr/lib/hadoop-0.20/lib/jackson-core-asl-1.5.2.jar:/usr/lib/hadoop-0.20/lib/jackson-mapper-asl-1.5.2.jar:/usr/lib/hadoop-0.20/lib/jasper-compiler-5.5.12.jar:/usr/lib/hadoop-0.20/lib/jasper-runtime-5.5.12.jar:/usr/lib/hadoop-0.20/lib/jets3t-0.6.1.jar:/usr/lib/hadoop-0.20/lib/jetty-6.1.26.jar:/usr/lib/hadoop-0.20/lib/jetty-servlet-tester-6.1.26.jar:/usr/lib/hadoop-0.20/lib/jetty-util-6.1.26.jar:/usr/lib/hadoop-0.20/lib/jsch-0.1.42.jar :/usr/lib/hadoop-0.20/lib/junit-4.5.jar:/usr/lib/hadoop-0.20/lib/kfs-0.2.2.jar:/usr/lib/hadoop-0.20/lib/libthrift.jar:/usr/lib/hadoop-0.20/lib/log4j-1.2.15.jar:/usr/lib/hadoop-0.20/lib/lucene-core-2.3.1.jar:/usr/lib/hadoop-0.20/lib/mockito-all-1.8.2.jar:/usr/lib/hadoop-0.20/lib/mysql-connector-java-5.1.15-bin.jar:/usr/lib/hadoop-0.20/lib/nzjdbc.jar:/usr/lib/hadoop-0.20/lib/oro-2.0.8.jar:/usr/lib/hadoop-0.20/lib/servlet-api-2.5-20081211.jar:/usr/lib/hadoop-0.20/lib/servlet-api-2.5-6.1.14.jar:/usr/lib/hadoop-0.20/lib/slf4j-api-1.4.3.jar:/usr/lib/hadoop-0.20/lib/slf4j-log4j12-1.4.3.jar:/usr/lib/hadoop-0.20/lib/thrift-fb303-0.5.0.jar:/usr/lib/hadoop-0.20/lib/xmlenc-0.52.jar:/usr/lib/hadoop-0.20/lib/jsp-2.1/jsp-2.1.jar:/usr/lib/hadoop-0.20/lib/jsp-2.1/jsp-api-2.1.jar:/usr/lib/zookeeper/zookeeper-3.3.3-cdh3u0.jar:/usr/lib/hbase/hbase-0.90.1-cdh3u0.jar:/usr/lib/hadoop/hadoop-0.20.2-cdh3u0-core.jar:/usr/lib/hbase/hbase-0.90.1-cdh3u0-tests.jar:/usr/lib/hbase/conf/ Please help !! Should i be copying over these jars to distributed cache myself? thanks Vrushali ________________________________ From: Suraj Varma <[email protected]> To: [email protected]; Vrushali C <[email protected]> Sent: Wednesday, February 8, 2012 12:26 AM Subject: Re: hbase - CassNotFound while connecting through mapper Perhaps your HADOOP_CLASSPATH is not getting set properly. >> export HADOOP_CLASSPATH=`hbase classpath`:$ZK_CLASSPATH:$HADOOP_CLASSPATH Can you set the absolute path to hbase above? Also - try echo-ing the hadoop classpath to ensure that HADOOP_CLASSPATH indeed has the hbase jars & conf directory. --Suraj On Tue, Feb 7, 2012 at 11:31 PM, Vrushali C <[email protected]> wrote: > > > I am trying to connect to an hbase table through a mapper's setup method. But > it throws a class not found exception. > > I have been reading the forums and understood I should be checking if hbase > is on the hadoop classpath. I also looked at > > http://hbase.apache.org/docs/current/api/org/apache/hadoop/hbase/mapreduce/package-summary.html#classpath > > According, I have tried both with setting -libjars as well as hadoop > classpath. I expanded all the jars in `hbase classpath` and mentioned them on > the -libjars option. > > I still get a Error: java.lang.ClassNotFoundException: > org.apache.hadoop.hbase.HBaseConfiguration > or a > > Error: java.lang.ClassNotFoundException: org.apache.hadoop.hbase.client.HTable > if I try to access HBaseConfiguration or HTable in the mapper code. > > Attempt at setting classpath > export ZK_HOME=/usr/lib/zookeeper > export ZK_CLASSPATH=$ZK_HOME/zookeeper-3.3.3-cdh3u0.jar > export HADOOP_CLASSPATH=`hbase classpath`:$ZK_CLASSPATH:$HADOOP_CLASSPATH > > attempt at including in libjars. > > -libjars > /usr/lib/hbase/conf,/usr/java/default/lib/tools.jar,/usr/lib/hbase,/usr/lib/hbase/hbase-0.90.1-cdh3u0.jar,/usr/lib/hbase/hbase-0.90.1-cdh3u0-tests.jar,/usr/lib/hbase/lib/activation-1.1.jar,/usr/lib/hbase/lib/asm-3.1.jar,/usr/lib/hbase/lib/avro-1.3.3.jar,/usr/lib/hbase/lib/commons-cli-1.2.jar,/usr/lib/hbase/lib/commons-codec-1.4.jar,/usr/lib/hbase/lib/commons-el-1.0.jar,/usr/lib/hbase/lib/commons-httpclient-3.1.jar,/usr/lib/hbase/lib/commons-lang-2.5.jar,/usr/lib/hbase/lib/commons-logging-1.1.1.jar,/usr/lib/hbase/lib/commons-net-1.4.1.jar,/usr/lib/hbase/lib/core-3.1.1.jar,/usr/lib/hbase/lib/guava-r06.jar,/usr/lib/hbase/lib/hadoop-core.jar,/usr/lib/hbase/lib/hbase-0.90.1-cdh3u0.jar,/usr/lib/hbase/lib/jackson-core-asl-1.5.2.jar,/usr/lib/hbase/lib/jackson-jaxrs-1.5.5.jar,/usr/lib/hbase/lib/jackson-mapper-asl-1.5.2.jar,/usr/lib/hbase/lib/jackson-xc-1.5.5.jar,/usr/lib/hbase/lib/jasper-compiler-5.5.23.jar,/usr/lib/hbase/lib/jasper-runtime-5.5.23.jar,/usr/lib/ > hbase/lib/jaxb-api-2.1.jar,/usr/lib/hbase/lib/jaxb-impl-2.1.12.jar,/usr/lib/hbase/lib/jersey-core-1.4.jar,/usr/lib/hbase/lib/jersey-json-1.4.jar,/usr/lib/hbase/lib/jersey-server-1.4.jar,/usr/lib/hbase/lib/jettison-1.1.jar,/usr/lib/hbase/lib/jetty-6.1.26.jar,/usr/lib/hbase/lib/jetty-util-6.1.26.jar,/usr/lib/hbase/lib/jruby-complete-1.0.3.jar,/usr/lib/hbase/lib/jsp-2.1-6.1.14.jar,/usr/lib/hbase/lib/jsp-api-2.1-6.1.14.jar,/usr/lib/hbase/lib/jsp-api-2.1.jar,/usr/lib/hbase/lib/jsr311-api-1.1.1.jar,/usr/lib/hbase/lib/log4j-1.2.16.jar,/usr/lib/hbase/lib/protobuf-java-2.3.0.jar,/usr/lib/hbase/lib/servlet-api-2.5-6.1.14.jar,/usr/lib/hbase/lib/servlet-api-2.5.jar,/usr/lib/hbase/lib/slf4j-api-1.5.8.jar,/usr/lib/hbase/lib/slf4j-log4j12-1.5.8.jar,/usr/lib/hbase/lib/stax-api-1.0.1.jar,/usr/lib/hbase/lib/thrift-0.2.0.jar,/usr/lib/hbase/lib/xmlenc-0.52.jar,/usr/lib/hbase/lib/zookeeper.jar,/etc/zookeeper,/etc/hadoop-0.20/conf,/usr/lib/hbase/hbase-0.90.1-cdh3u0.jar,/usr/ > lib/hbase/conf,/usr/lib/hbase/conf,/usr/lib/hbase/hbase-0.90.1-cdh3u0.jar,/usr/lib/hadoop/hadoop-0.20.2-cdh3u0-core.jar,/usr/lib/zookeeper/zookeeper-3.3.3-cdh3u0.jar > > Would appreciate any help!! > > > Stack trace: > 12/02/07 23:24:21 INFO mapred.JobClient: Task Id : > attempt_201202071551_0032_m_000000_2, Status : FAILED > Error: java.lang.ClassNotFoundException: > org.apache.hadoop.hbase.HBaseConfiguration > at java.net.URLClassLoader$1.run(URLClassLoader.java:202) > at java.security.AccessController.doPrivileged(Native Method) > at java.net.URLClassLoader.findClass(URLClassLoader.java:190) > at java.lang.ClassLoader.loadClass(ClassLoader.java:307) > at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) > at java.lang.ClassLoader.loadClass(ClassLoader.java:248) > at java.lang.Class.forName0(Native Method) > at java.lang.Class.forName(Class.java:247) > at > org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:943) > at org.apache.hadoop.conf.Configuration.getClass(Configuration.java:994) > at > org.apache.hadoop.mapreduce.JobContext.getMapperClass(JobContext.java:212) > at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:601) > at org.apache.hadoop.mapred.MapTask.run(MapTask.java:322) > at org.apache.hadoop.mapred.Child$4.run(Child.java:268) > at java.security.AccessController.doPrivileged(Native Method) > at javax.security.auth.Subject.doAs(Subject.java:396) > at > org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1115) > at org.apache.hadoop.mapred.Child.main(Child.java:262) > > > Thanks > Vrushali
